Radial turbine.



s. LIUNGsTRII/I.

RADIAL TURBINE. APPLICATION FILED DEC. 14, I9I4.

Pa-entd July T13, 1915.

El ttor/mm3 o 1 Sweden, *ful Improvements in Radial Steam or Gas Turbines, ofwhich the following vis a specication. l l

`lar view,

UNiTED sTArEs PATENT ornrcn.

SIBGER LJUNGSTRM, STOCKHOLM, SWEDEN, .ASSIGNOB TO AKTIEBOLAGET 'LJUNGSTROMS NGTURBIN, 0F FINSPONG, SWEDEN.

RADIAL 'ruiter-NE.

ispecicaton of Lettersiratent. Paene-July 13, 1915.

Appiicationnieaneeember 14, 191:11. serial No. 877,150.

ToaZZ whom it may concern;

Be it known 'that I, BIRGER LJU'NGs'rRM, engineer, a subject of the King of Sweden, and a citizen of Sweden, residing at Regeringsgatan 52, Stockholm, in the Kingdom of have invented Vcertain new and use- In radial steam or gas turbines with drumshapedvane-rings, which'contain a number of vanes, arranged axially behind each other and v4attached to intermediate supporting rings, there arise very great diiliculties as to the balancing of the vane rings. v

The' resent invention4 has .for its `purpose ,to avoi or diminish these d..tiiculties. This is attained Vby forming the vane rings in such a way, that they taper in steps, continuously or otherwise from their` fastening point in axial direction instead of being cylindrically' formed as has hitherto been the case.

In-the ,accompanying drawings: Figure 1 represents a vertical section of the two outermostvane of a pair of turbine wheels embodying my invention and the means connecting said rings to said wheels, the proximate portionsof the latter being shown partly in section, partly in elevation and broken away; Fig. 2 represents a simiomitting the connections, of a slightly modified pair of vane rings which taper continuously and have smooth inclined meeting faces; Fig. 3 --represents another modification having the tops of the vanes in each vane ring in the same horizontal` plane, but the intervening supporting rings increasing regularly in height so as to constitute a tapering form as a whole for each vane ring; Fig. 4 represents a View similar to Fig. 3, but reversing this relation of supporting rings and vanes,though retaining the tapering structure of eachfvane ring as a whole; Fig'. 5 represents a similar view of another modication having both the vanes and supporting rings increasing regularly in height, the former step by step, the latter continuously; and Fig. 6 represents a similar view of another modification resem- 'ning rig. n ba haviig the Steps f the inclined meeting faces of the rings made broad enough to include'two vanes in each instance.y g a, a1v indicate two turbine wheels, vrotating 1n oppositedirections and carrying the two vane rings. b, b1' by means of the intermediate parts c, c1.

e indicates the vanes-and al indicates the rings, supporting the vanes.

'As shown in Fig. 1 ofthe drawing the yane rings taper in steps from the fastening point. Hereby, of course, the center of gravity of each ring will lie Vmore near the fastening point, which enables a better balancmg of the ring. Instead of being formed as shownA in said figure,."-the vane rings can taper continuously as shown in Fig. 2. Only the supporting rings (see Fig. 3) or only the vanes (see Fig. 4),'taper in any way, or the supporting ringspandv vanes taper in dii'erent ways as for instance the former in steps and the latter continuously (see Fig.

5). Further the vane'jffrings can be constructed in such a.,man.ner,that each step contains two or more vane lengths (see Fig. 6).

In'the embodiment shown in Fig. 1 the steps of two vane rings project into each other-N,

Claims.

1. A pair of turbine wheels, in combination with a Ypair of vane rings respectively carried thereby, vanes carried by said rings and connections between nsaid wheels and rings whereby each ring is supported by one of said wheels and the other ring is supported byA the otherV wheel, the two rings tapering from their points lof attachment to said wheels and in reverse direction with regard to each other.

2. A pair of turbine wheels, in combination with a pair of vane rings respectively carried thereby, vanes carried by said rings and connections between said wheels and rings whereby one ring is supported by one' *Y nineties engi projeoting' oorresponingly into eaoh of venes and intermediate supporting rings ot er.4

v3. pair of coperating vane rings at- In testimony whereof if have axeoi my tached to reversely operating Wheels and signature in presence Of-two Witnesses.

v`5 tapering in opposite directions from their BRGER 'LJUNGSTRM Apoints of attachment by reason of the 1n- ;Vf'nesses:V crease of height of each alternate element in y HARRY ALBIHN,

each vane ring, said rings being composed. G. LJUNGSTRM arranged alternately. i@ 

